# DJ controller Sequential FourM — compact MIDI controller for performance and production

**URL:** https://aio.lv/en/product--sequential-seq-3900--12248928
**Data updated:** 2026-04-03 16:38 (EEST)
**Category:** DJ Controllers & MIDI keyboards
**Manufacturer:** Sequential
**Manufacturer code:** SEQ 3900
**EAN:** 0855346000487
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 852.49 €
**Prices and availability valid until:** 2026-07-04 23:59
**Price without VAT (21%):** 704.54 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sequential-seq-3900--12248928

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.06.2026 | free |
| Pickup points | 19.06.2026 | 1.99 EUR |
| Courier delivery to door | 19.06.2026 | 6.04 EUR |

## Summary description

Sequential FourM is a DJ/MIDI controller by Sequential designed for live performance and studio production. It functions as a compact MIDI interface and control surface for DJ software and DAWs, offering hands-on control of tracks, effects and mixing. The unit connects via MIDI/USB and is intended for DJs, electronic musicians and producers who need portable hardware control.

## Long description

Sequential FourM is a compact DJ and MIDI controller designed for live performance and studio production. The unit acts as a portable control surface and MIDI interface that connects to computers and hardware via USB/MIDI, providing tactile control over tracks, effects, mixing and transport functions. Its compact footprint and streamlined set of controls make it suitable for mobile setups, small studios and live rigs where hands-on control and quick workflow are required.
Advantages
The Sequential FourM offers a small, robust form factor that reduces setup complexity while keeping essential controls within immediate reach. It provides low-latency MIDI communication and seamless integration with common DJ software and DAWs, enabling precise parameter adjustments and reliable performance. The controller’s layout is optimized for quick access to transport, cueing and effect parameters, helping to maintain workflow efficiency during both live sets and studio sessions.
Suitable for
 Mobile DJs who need a portable control surface for live sets
 Electronic musicians and producers integrating hardware control into DAW sessions
 Small studio setups where space and simplicity are priorities
 Performers requiring hands-on control of effects, mixing and transport
Key specifications
 Compact form factor designed for portability and small setups
 MIDI and USB connectivity for integration with computers and external gear
 Dedicated transport and cue controls for DJ and production workflows
 Knobs and faders for real-time parameter control of effects and mixing
 Low-latency performance suitable for live use and studio monitoring
How to use
Connect the Sequential FourM to your computer or compatible hardware via USB or MIDI connection, install any required drivers if specified by your software, and map the controller to your DJ application or DAW either automatically or via MIDI learn. Use the transport controls to start, stop and cue tracks, adjust levels and effect parameters with the knobs and faders, and switch between modes or banks if your software supports extended mappings. For live performance, set up cue points and assign effects to physical controls to enable immediate response during sets.
Usage recommendations
For reliable operation, use a high-quality USB cable and connect through a powered USB hub or directly to your computer when possible. Test mappings and latency before performances, and save controller templates or presets within your software to ensure repeatable setups across shows and studio sessions.

## FAQ

### How much does the DJ controller Sequential FourM cost, and is it available for purchase?

The price is 852.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 17 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 16.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can DJ controller Sequential FourM be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Sequential products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Sequential service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12248928/68547078_large.webp